What defines a sexy walk? See how men and women change their gait when they think eyes are watching.

Science of Sex Appeal: Attractive Facial Features

What are the most attractive facial features of men and women according to science? Discovery Channel's "The Science of Sex Appeal" takes a look.

Science of Sex Appeal: Attractive Male Odor

There's no such thing as attractive male odor, unless the woman is ovulating. Watch this smelly experiment in Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Biological Sex Appeal

Sex appeal has been scientifically proven to be a biological imperative. Evolution controls our desires. Learn more about this enticing subject in Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Facial Recognition Experiment

In order to determine if we can be physically attracted to our close family members, Lisa DeBryne is conducting a facial recognition experiment. Watch more in this clip from Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Facial Symmetry Importance

When it comes to facial attractiveness, symmetry plays a big role according to this experiment. Watch more in this video from Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Female Copulance

Could copulance be a hidden weapon in women's armory of attraction? Men seem to lose all ability to think clearly when exposed. Learn more from Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Flirting Females

It may be no surprise that bare skin and exaggerated dance movements cause male testosterone to rise. Watch how female flirtation techniques change during ovulation in this video from Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Love for Life

Can humans love for life? According to professor Helen Fisher, there are signs of it all around us. Watch more in this clip from Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Mating for Life

Are humans biologically programmed to mate for life? Learn some of the surprises of human mating strategies in this video from Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Out of Your League?

While scouting for an attractive partner, you might have to settle for someone "in your league." Watch a mate selection experiment in this video from Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Sex vs. Love

What differs in our brain when we fall in love? Is there a difference between just lusty sex and love? Find out in this clip from Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Sexy Body Motions

What types of body movements are considered sexy? Watch a study of human body motions in Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Sexy Voices

What makes a voice attractive? Discover what qualities are most desired by the opposite sex in Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Shapely Figures

Why is the shape of the body so important? Scientist Carrie Johnson has determined certain shapes that drive us wild. Learn more in Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Skin Signals

Watch this experiment of skin attractiveness, and the signals the skin can send in this clip from Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Testosterone vs. Dopamine

Testosterone and dopamine drive sexual behavior. What's the difference? Find out in this video from Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Unsexy Scents

Research has shown that a woman's sense of smell protects her from mating with a relative. Find out how in Discovery Channel's "The Science of Sex Appeal."

Science of Sex Appeal: Women Are Choosier

Why are women more selective than men? It's biological. Find out why in this video from Discovery Channel's "The Science of Sex Appeal."